laravel5.4 orm with usage

In a with association method in laravel orm, the relationship between tables needs to be defined in the template first

　　/*One-to-many relationship*/ 

　　public  function hasManyTemplate(){

        return $this->hasMany('App\Models\Demo\MakeTemplateFile','user_id','id');

    }
　　/* one-to-one relationship */
    public function hasOneVerifyConfig(){

        return $this->hasOne('App\Models\Demo\VerifyConfigs','type','verify');
    }

 

            $data = User::with(['hasManyTemplate'=>function($q){
                $q->select(['user_id','preview_address']);
            },'hasOneVerifyConfig'=>function($q){
                $q->select(['type','intro']);
            }])
                ->find(1);
            dd($data);

When using with, the associated fields should also be added. If not, there may be a null value (or null)